Telephone receiver



A. PIHL TELEPHONE RECEIVER March 16 1926. 1,577,295

Original Fileci De-c. 27, 1922 AlberEPihL Patented Mar. 16,1926.

"entree STATES PATENT -FFics.

do ALBERT PIHL, or MURRAY, UTA nssren'ort T cannons. BoaKiuAN, or SALT LAKE 'rnnnrnonn RECEIVER.

Application filed December 27,1922, Serial No. 609,191. Renewed February 9, 1926.

To all whom it may concern,"

Be it known that I, ALBERT PIHL, a citizenof the United States, and resident of Murray, in the county of Salt Lake'and State of Utah, have invented certain new and useful Improvements in Telephone Receivers, of which the following is a specifia reversely bent end provided with a hole cation.

My invention relates to an improved telephone receiver of what is known as the watch case type, and isparticularly adapted for wireless telephony although not limited in its use thereto;

An object is to provide a receiver which 'will be simple in structure but very eflicient in operation, and which may be'readily assembled.

Another object is to arrange the pole pieces and armature so that the latter will be very sensitive" to slight currents and may be easily operated.

Other objects will be apparent from the following detailed descriptionand' the ap pended claims.

In the drawings:

Figure 1 is a cross section through the receiver in its case with parts shown in elevation.

Figure 2 is a face View of the receiver with the cover of the case removed.

Figure 3 is a bottom plan of the receiver removed from the case.

Figure 4 is a detached view of one pole piece and the armature carried thereby, the two parts being shown disassembled.

To a ring 1 is secured a permanent magnet 2 of the shape shown in Figure 3, the ring and magnet being secured together by bolts 3 and 4. The top pole piece 5 fits in a cut out portion of the permanent magnet shown in Figure 1, and is attached in a cut out of the magnet 2 by the bolt 3. It will thus be noted that the two bolts 3 and 4 hold together the ring, and both pole pieces, and that the pole pieces hold the coil in position between them. The pole piece 10 is approximately T-shaped, and the bolt 3 passes through an opening 11 inone end 7 thereof. The other end of the pole piece 10 An armature 16 of" the general form" shown in Figure 4 has attached to it in any desired manner a spring portion 18 having -18. A bolt 19 which passes through the holes 15 and 18 fastens the spring portion 17 of the armature to the pole piecelO. The

armature is provided 'with cone shaped an annular depression in the ring 1 so that it lies flush with the face of the ring.

Binding posts 24 are'provided which'are carried by the ring 1 and 'may be of the split type or of any other desired form. It may be seen that all of the above described parts are carried as a unit by the ring 1, and

, this unit is preferably inclosed Within a case 25 having a cover 26 provided with central air openings 27. This case and cover member are preferably formed of hard rubber or similar insulating material.

I claim as my invention:

1, A telephone receiver comprising a ring member, a U shaped permanent magnet carried by said member, pole pieces attached to the ends of the magnet and extending toward each other in substantially parallel planes, a coil retained in position between the free ends of the pole pieces and having its axis at substantially right angles to said planes, an armature pivotally carried by one of said pole pieces, a diaphragm carried by the ring member, and means connecting the armature to the diaphragm.

2. A telephone receiver comprising a ring member, a permanent magnet carried by said member and having free ends, pole pieces attached tothe ends ofthe magnet and extending toward each other in substantially parallel planes and having their free ends overlapping, a coil mounted between the free ends of the pole pieces and having its axis at substantially right angles to said free ends, an armature pivot-ally supported by At the end thereofthe arma- 7 one of said pole pieces, a diaphragm, and means connecting the armature to the diaphragm.

A telephone receiver comprising a ring member, a permanent magnet carried thereby, pole pieces attached to the magnet and having free ends extending toward each other in substantially parallel planes, a coil supported between the free ends of the pole pieces and having its axis at substantially right angles to said planes, an armature pivotally supported by one of the pole pieces,

adiaphragm, and means connecting the armature to the diaphragm.

4. A telephone receiver comprising a supporting member, a permanent magnet carried by said member and having free ends, two pole pieces attached. to said magnet and having free ends extending toward each other, a coil supported between the free ends of the pole pieces and also between the free ends of the pern'ianent magnet, a diaphragm carried by said supporting member, an armature plvotally carried by one of the pole pieces, and means connecting the armature with the diaphragm.

A telephone receiver comprising a supporting member, a permanent magnet car ried thereby. a pole piece attached at one end to the magnet and having a core at the other end, a coil snrrmmding said core, a second pole piece attached to the magnet and extend ing over said coil, an armature pivotally attached to the second pole piece and extend ing adjacent said core, a diaphragm, and means connecting the armature to the diaphragm.

6. A telephone receiver comprising a supporting member, a permanent magnet carried thereby, two pole pieces attached to said magnet and having free ends extending towards each other in overlapping parallel relation, an armature pivotally mounted in termediate its ends in one pole piece, a spring member connected to the armature at one end and to the pole piece at its other end, a diaphragm, and means for connecting the free end of the armature to the diaphragm.

7. In a telephone receiver a pole piece provided with two pairs of effect ears, an armature lying therebetween and pivoted to one pair of ears, a spring connected to one end of the armature-and to the pole piece and means for connecting the other end of the armature to a diaphragm.

8. A telephone receiver comprising a permanent magnet and extending at an angle thereto in substantially overlapping parallel relation, a coil, two pole pieces attached to the magent, a core for the coil carried by one pole piece, an armature pivotally mounted intermediate its ends in the other pole piece, and spring means connected to one end of the armature and. to the pole piece.

In testimony whereof, I have hereunto subscribed my name.

ALBERT PIHL. 

